..and the arpeggio on rio is the jp4 where-as the arpeggio on hungry like the wolf was a jp8

The arpeggio on 'Hungary like the wolf' was also the Jupter-4. The 'Rio' arpeggio sound is actually one if the 10 presets, the Bass one. You can also here this sound on 'Friends of mine'.

i would swear i read that HLTW was the JP8 and not the JP4..
i know rio was the JP4.. although VSE says otherwise, somewhere i have the article with nick saying how they processed his JP4 for that song.. and yeah, he did say it was the 'bass' preset..

..and the arpeggio on rio is the jp4 where-as the arpeggio on hungry like the wolf was a jp8

The arpeggio on 'Hungary like the wolf' was also the Jupter-4. The 'Rio' arpeggio sound is actually one if the 10 presets, the Bass one. You can also here this sound on 'Friends of mine'.

i would swear i read that HLTW was the JP8 and not the JP4..
i know rio was the JP4.. although VSE says otherwise, somewhere i have the article with nick saying how they processed his JP4 for that song.. and yeah, he did say it was the 'bass' preset..

Here's a quote from Nick Rhodes which implies that he used the JP8, not the JP4, for the arpeggiated part on HLTW:

"...take something like the song "Hungry Like The Wolf" [from Rio]. I was in an EMI demo studio in London when I wrote that. We'd been up til some ridiculous hour of the night before, and I had struggled to get into the studio that morning. I thought that I'd get nothing done that day at all, so I sat by the Jupiter-8, pressed the hold button, put in an arpeggio, and just fiddled with the sound a bit. I started playing chords - one after the other, because you can't change them while its still on hold-and "Hungry Like The Wolf" was born within about half an hour. "

I may be wrong but I think Nick used the SH-2/CSQ-100 combo for that part when performing HLTW live back in '82 --just as he did on Save A Prayer.

"The (Yamaha) CS-80 is a step ahead in keyboard control, and a generation behind in digital control" -- Dan Wyman, Jan 1979